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(x_produce_image_glyph, x_append_stretch_glyph): Accomodate to
changes in struct glyph starting 1999-12-27.  Some bit-fields of
struct glyph were not set, which made glyphs unequal when compared
with GLYPH_EQUAL_P.  Redisplay outputs such glyphs, and flickering
effects were the result.  This also depended on the contents of
memory returned by xmalloc.  If flickering happens again, activate
the code in clear_glyph_row that's in #if 0.  If the flickering is
gone with that, chances are that it is caused by something
similar.

display info for XIM.
(xim_open_dpy): Likewise.
(xim_close_dpy): Don't free the display info's XIM.

with !USG (following xmenu.c).

returns XLookupChars, reset `modifiers' to zero.

(x_alloc_nearest_color_for_widget): Use it.
(x_copy_dpy_color): New function.
(x_destroy_window): Free various colors.

access the data it doesn't point to.

will be translated to a switch-frame event in when reading the
event queue.  This is necessary because Emacs otherwise won't
perform a switch-frame to a new frame until some other event, for
example a keystroke event, forces it to do so.  This has various
effects, one visible being that the cursor of a frame created with
C-x 5 2 or switched to with a window manager key binding like
A-TAB stays hollow because selected_window isn't on the newly
focused frame until the switch-frame is performed.

this isn't true for images with `:ascent 100'.

glyph, use the ASCII NUL character to determine the face.

that x_per_char_metric returns null.

(x_draw_image_relief, x_draw_image_foreground_1): Call function
image_ascent instead of using IMAGE_ASCENT.

prompt_width.  Add extra line spacing.

that the per-character metrics may be null.

or ASCII, handle case that per-char metric is NULL.

Verify correct object type before returning pointer, using eassert.
* frame.h (XFRAME): Likewise.

* buffer.c (Frename_buffer, Fset_buffer_multibyte,
swap_out_buffer_local_variables, Fmove_overlay): Don't apply XSYMBOL, XBUFFER,
etc, to values that may be nil or of the wrong type.
* data.c (set_internal): Likewise.
* dispextern.h (WINDOW_WANTS_MODELINE_P, WINDOW_WANTS_HEADER_LINE_P): Likewise.
* fileio.c (auto_save_1): Likewise.
* insdel.c (check_markers): Likewise.
* marker.c (buf_charpos_to_bytepos, unchain_marker): Likewise.
* undo.c (record_insert): Likewise.
* vmsproc.c (child_sig): Likewise.
* window.c (unshow_buffer, window_loop): Likewise.
* xterm.c (x_erase_phys_cursor): Likewise.

(x_alloc_nearest_color) [DEBUG_X_COLORS]: Call register_color.

on buffer-local value of cursor_type.
(x_draw_bar_cursor): Add parameter WIDTH.

not visible in the window.

(x_per_char_metric): Don't try FONT->default_char.  Even if
pcm->width is zero, glyph bits may exist.
(x_encode_char): Always initialize char2b->byte1.
(x_get_char_face_and_encoding): Call FACE_FOR_CHAR to get face_id.
(x_get_glyph_face_and_encoding): New arg two_byte_p.  Caller
changed.
(x_append_glyph): Set glyph->glyph_not_available_p.
(x_produce_glyphs): Set it->glyph_not_available_p.  Don't set
it->charset.  Handle the case that per char metric is not
available.  If it->multibyte_p is zero and it->c is a multibyte
character, convert it to a unibyte character.
(struct glyph_string): Delete member `charset'.
(x_set_mouse_face_gc): Call FACE_FOR_CHAR to get face_id.  Handle
the case that per char metric is not available correctly.
(x_fill_glyph_string): Handle the case that the specific glyph is
not available correctly.
(BUILD_CHAR_GLYPH_STRINGS): Don't set s->charset.
(BUILD_COMPOSITE_GLYPH_STRING): Likewise.
(x_new_font): Call FS_LOAD_FONT, not fs_load_font.
(x_new_fontset): Call fontset_ascii to get ASCII font name of the
fontset.  Don't call FS_LOAD_FONT.

who are in the process of being deleted.

support functions only if HAVE_X11R6_XIM is defined.
(xim_instantiate_callback): Define only if HAVE_X11R6_XIM.

close the display with XtCloseDisplay.  This caused a bus error
on OpenWindows.

default visual.

structure.  Copy colormap if resource `privateColormap' is
specified (PseudoColor only).
(x_setup_relief_color): Access colormap of frame using
FRAME_X_COLORMAP.

(x_per_char_metric_1, x_default_char): New functions.
(x_per_char_metric): If font's default char is invalid, return
metrics of a suitably chosen usable default char.
(x_draw_glyph_string_foreground): If font has an invalid default
char, replace occurrences of that char with a suitably chosen
usable default char.

glyph matrices have been freed.

x_free_colors.

non-selected windows depending on the setting of
cursor_in_non_selected_windows.

(x_display_cursor): Don't set it here.
(XTread_socket) [HAVE_X_I18N] <KeyPress, KeyRelease>: Don't
dispatch the event.

that XTread_socket does not crash by trying to call XNoOp on a
closed display.

is its frame's selected window.
(xim_instantiate_callback): Likewise.

(XTread_socket) [HAVE_X_I18N]: If event is for none of
our frames, call XFilterEvent with 2nd parameter `None'.
(XTread_socket) <KeyPress> [HAVE_X_I18N]: Handle XmbLookupString
returning XBufferOverflow.
(XTread_socket) <ConfigureNotify> [HAVE_X_I18N]: Set XIC status
area.
(x_display_cursor) [HAVE_X_I18N]: Set XIC pre-edit area.
(x_new_fontset) [HAVE_X_I18N]: Create XIC status area fontset.
(xim_destroy_callback, xim_open_dpy, xim_instantiate_callback)
(xim_initialize, xim_close)
[HAVE_X_I18N && HAVE_X11R6]: New functions.
(x_destroy_window) [HAVE_X_I18N]:  Call xic_destroy_frame.
(x_term_init) [HAVE_X_I18N]: Call xim_initialize.
(x_delete_display) [HAVE_X_I18N]: Call xim_close.

(toolkit_scroll_bar_interaction): New variable.
(Fxt_process_timeouts): Removed.
(x_process_timeouts): New function.
(xt_action_hook): Clear toolkit_scroll_bar_interaction.
(x_send_scroll_bar_event): Set toolkit_scroll_bar_interaction.
(x_make_frame_visible): Call poll_for_input_1 instead of
input_poll_signal.  Don't call alarm.
(x_initialize): Install timer calling x_process_timeouts.